Evaluation instruments

Suppose you are a manager and have to choose a set of evaluation instruments for assessing the work performance of your employees. Pick any job you wish. Pages 145-154 of the textbook describe three general kinds of instruments (checklists, comparison rankings, rating scales). Pick one example from each category (e.g., a weighted checklist, a point allocation ranking, a BARS rating scale) and show how you could use each to evaluate the performance of your employees. What would be the advantages and disadvantages of each instrument? How could you combine these three instruments to obtain an overall score?